Magazine grinder



Sept. 8, 1936. c. A.v wATERoUs I. MAGAZINE GRINDER l Filed Jun e 29, 1935 5 Sheets-Sheet 1 A. m u v M Sept. 8, 1936. c. A. WATEROUS MAGAZINE GRINDER 5 Sheets-Sheet 2 Filed June 29, 1935 Sept. 8, 1936. c. A. wATERoUs MAGAZINE GRINDER f Filed June 29, 1935 5 spets-sheef 3 i 15 L"Aj-z; 10 O 'f mi O r: .z .::r--z--z-z-l Sept. 8, 1936. c. A. wATERous 2,053,505

' MAGAZINE GRINDER Filed June 29, 1935 5 Sheets-Sheet 4 [ba/zg gmw Sept, 8, 1936. c. A. WATEROUS MAGZ INE GRI NDER Fild June 29, 1933 5 Sheets-Sheet 5 Patented Sept. 8, 1936 UNITED STATES MAGAZINE GRINDER Charles Alexander Waterous, Brantford, Ontario, Canada Application June 29, 1933, Serial No. 678,295

5 Claims.

This invention relates to magazine grinders and more particularly to log holding arrangements operating on the magazine to control the movement of the columnl of logs therewithin.

Log holding arrangements have been heretofore employed, for acting upon a column of logs within a magazine to withhold a certain section of the logs from downward movement during certain phases of operation. These devices have been of the type that contact with the logs under pressure so as to cause them to form a bridge at a certain point within the magazine designed to prevent the logs thereabove from dropping. These devices are not positively acting for the reason that the logs form-ing the bridge in the center of the magazine may become released and drop sincel they are only held by a side pressure exerted between the logs and thus it is not possible properly to control a given body of logs with any certainty or degree of accuracy. In various instances, therefore, this type of device is unsatisfactory. To provide for successful operation of av grinder employing this principle, it is necessary to provide means for splitting a column of logs which will positively retain all logs from a given po-int against movement.

It is an object of the present invention, therefore, to provide means for positively splitting a column of logs in a magazinev so as to relieve excessive pressure at the grindstone hindering proper operation while permitting pressure from a column of logs suiiicient to hold down the logs in the grinding pocket.V

A further object of the invention is to provide means of this character whichy may be positioned on the magazine at a desired point.

A further object of the invention is to provide means of this character whereby the quantity of logs forming a charge for the pocket may be controlled sov as tok provide for lling of the pocket to its capacity without overloading.

` A further object of the invention is the pro-V vision of means of this character which may be operated to function by means which may synchronize with parts of the grinding apparatus or which may be operated by any suitable means.

A still further object of the invention is to provide a simple type of mechanism which will contact with the logs within the magazine in such a manner as to positively hold a plurality of logs across the width of the magazine which lie in substantially the same plane and thus positively hold all logs lying thereabove.

With these and other objects in view the invention consists essentially of mechanism which may be applied at any desired point throughout the height of the magazine to accomplish the purpose desired, including a plurality of spikes, pins or the like positioned to operate in unison, when actuated by any suitable means tov contact with or spike the ends of a plurality of logs throughout the width of the magazine, said mechanism (zo-operating with the pressure shoe of the magazine or with a shut off door which may be employed to close the top side of the grinder pocket or, as indicated, any other means which may be suitablefor effecting this operation. The inventionv also includes an arrangement of this character as applied to certain types of magazine to provide for forming indivi-dual charges for the grinder pocket and for charging these pockets in a desired mannen as more fully described in the following specification and illustrated in the accompanying drawings which form part of the same.

Figure 1 illustrates a. side elevation of a practical form of apparatus for splitting or separating into sections a column of logs, the mechanism being shown mounted on a magazine which is illustrated in dotted lines;

Figure 2 is a view similar to Figure 1 but illus-v trating an end view of the mechanism;

Figure 3 is atop plan view of the mechanism illustrated in Figures 1 and 2 also showing the magazine in dotted lines.

Figure 4 is a fragmentary plan view of a magazine showing logs carried therewithin and the pins or spikes projecting into the ends of the logs across the width of the magazine.

Figure 5 is a sectional side elevation of a pocket grinder having a lower magazine to which this mechanism has been applied to provide a new combination arrangement effecting control of the charge to the pocket.

Figures 6v and 7 illustrate fragmentaril-y a longitudinal sectional view and a side view respectively of a modified form of apparatus.

Referring more particularly to Figures 1-4, A indicates the magazine of a grinder, B indicates the pressure shoe therefor and C indicates a form of log holding appliance which comes within the scope of the present invention.

In grinders wherein the column of logs in the magazine extends down into the pocket there is considerablepressure exerted within the lower part of the magazine and also within the pocket and, while a certain log pressure is necessary to hold the pocket logs down in place, yet, if the log column is too high, an excess pressure. is created. 55

In this way, packing occurs within the pocket which will bring about bridges between the top of the pressure shoe and the. nger bar of the grinder over the stone, tending to retard the advance of the pressure shoe and requiring, in the automatically operated grinder, an operator to retire the pressure shoe away from the stone and reset it for forward movement.

According to the present invention the log column is designed to be split or separated by the log holding appliance C which may be advantageously positioned to permit a sufficient height of logs underneath it in the magazine to provide the required pressure and which functions to contact positively with a. plurality of logs which lie in substantially the same plane across the width of the magazine to securely hold all logs above such a plane from exerting a downward pressure upon w those below. A salient feature of the apparatus consists in the provision of a plurality of pins or spikes I0 which may be spaced across the width of the magazine so as to contact in most cases with every log across the width of the magazine in a given plane. Alternatively, the spikes, as illustrated may be replaced by any suitable means which will positively engage with the ends of a plurality of logs, as referred to, to securely hold them against movement, In the practical illustration shown in the drawings the log retaining members or spikes IIJ are carried in a unit by suitable cross bars I I in spaced apart parallel relation," the bars II being slidably mounted on opposite sides of the. magazine in the saine plane in suitable brackets I2. Suitable plates I3 may be provided on the sides of the magazine formed with orifices I4 through which the spikes or pins I0 may be caused to Yproject so as to be brought into contact with a Yseries of logs when this is desired. Any suitable means may be employed to operate these log holding devices into contact with the logs andone form of arrangement is shown in Figures 1-3 which synchronize with the operation of the pressure shoe B. Mounted on a suitable bracket I5 is a pressure cylinder I6 which is controlled by a valve mechanism in a housing I1. The piston rod I8 of the cylinder I6 is designed to be pivotally secured to an operating rod I9 which Iis in turn pivotally connected to the double armed lever 20 swingably mounted on the side of the magazine A and keyed to the shaft 2| which, upon rotary movement will actuate a corresponding double armed lever 22 carried on the opposite side of the magazine. The levers 20 and 22 are pivotally connected as at 23 to links 23 pivotally connected to the bar or plate I3 on that side of vthe magazine, while through links 24, pivotally connected at one end respectively, with the levers 20 and 22 and at the opposite ends with levers 25, in turn connected to the opposite bar or plate I3 by the links 26, the bars or plates I3 and carried log engaging devices may be caused to operate simultaneously towards or away from the logs upon corresponding movement of the piston rod I8.

The valve structure in the housing I1 associated with cylinder I6 is operated through the rod 21 which extends vertically downward from the valve housing to pivotally connect with one arm 28 of the bell crank lever 29. The opposite arm 30 of this bell crank lever is pivotally mounted as at 353A and terminates in a roller 3| which is positioned in the path of a wedge-like member 32 carried on the outer end of the pressure shoe B so that when the pressure shoe moves inwardly to force the logs in the grinder pocket against the grindstone and has almost reached the end of the stroke the wedge 32 will move the bell crank lever to swing about its pivotal point and draw downwardly upon the valve rod 2l. This will cause the piston to reverse and move the piston rod to the right, thus bringing the log retaining members or spikes I0 out of contact with the logs, as shown in Figure 1, allowing the logs to drop and ll up the space in the magazine below the spikes I0, before the pressure shoe has reached the end of its forward stroke the wedge 32 will have passed under roller 3l which will drop down behind the wedge and in doing so will move valve rod 2l causing piston I8 in cylinder I6 to move forward and force spikes IIJ into contact with the ends of the logs, across the width of the magazine in the path of the spikes.

When the pressure shoe is reversed so as to receive a new load of logs in the pocket arm 3] through the roller 3I will be forced by the movement of wedge 32 to swing freely outwardly about pivotal point 30A, as shown in dotted lines in Figure 2, without moving valve rod 2l. As the pressure foot B is reversed only the logs below the spikes IE) drop into the pocket as all logs above the spikes are held there, so that there is a vacant space between the spikes and the top of the log pack below, which has fallen away to iill the grinder pocket. This space is maintained until the pressure shoe has almost reached the end of its forward or grinding stroke when the top logs are again released as already described.

This mode of operation always provides for a vacant space as referred to between the spikes and the top of the log pack below and provides for any natural displacement of logs from the magazine during the grinding operation. In other words, the space is provided at a certain point in the operation of the pressure shoe, as is apparent from the above, and should the pressure shoe nd it necessary to displace some logs from in front of it up into the bottom of the magazine, thus relieving any binding through excessive loads above, the logs will readily dis-Y place into the bottom of the magazine without any difficulty because the main column of logs is spaced above and suspended.

This type of apparatus may be employed to provide a different mode of charging a grinder pocket, particularly in the case of magazines of the low built type and serves to provide a combination which will permit the use of a closure door for` the top of the grinder pocket and provide for loading into the pocket only a suicient quantity of logs to approximately and suitably recharge the grinder pocket. An illustration of this type of arrangement is shown in Figure 5 wherein D indicates a magazine, E indicates the grindstone, F the grinder pocket, G the pressure shoe and C the log retaining apparatus. The apparatus C is positioned on the magazine so that the column of logs below the log retaining device will represent a quantity sufficient to suitably kcharge the grinder pocket F and each time that the log retaining devices are released the required quantity of logs to form the charge will drop to position for charging. In the low type of magazine it may be divided so as to contain just above the grinder pocket F a suicient quantity of logs suitable to recharge the pocket and a quantity of logs above the holding device corresponding to that held just above the grinder pocket.

Co-operating with the mechanism for actuating the pressure shoe is a cylinder 34 carrying an operating,- pistonA which, v through the piston rod 36` reciprocates the clcsurejdoor A3'|.-positioned between the magazine D and the grinder pocket F, the. arrangement being such that when .the pressure shoe commences its' pressure movement the closure. door 311fis in the position illustrated in Fig-ure v5, whereas; when the pressure shoe.v G is returned in a .direction away from the grindstone E the cylinder 34 will' cause the; d-oor 31 to move in the same direction thus to allow the charge bearing upon-the door to drop. into the pocket. At the same time as the doormoves in this directionan inclined wedge mernber'iiY will contact with the roller 39 on the end of thevalve rod 4!! which controls the valve within the housing '4| lso that the cylinder 42 will cause the log retaining device to contact with the series of logs across the width of the'magazine at the point where the device is positioned andv thus prevent these logs and those thereabove from dropping. However, when the pressure shoe G starts its pressure movement again, the door 31' closes and the log retaining device C is released 'so that the next charge drops upon the door ready for admission to the grinder pocket and in the case of the low type of magazine the next charge can be introduced or, in that type which` employs a magazine of considerable length. the next charge already in place will be held vby these log retaining devices at the proper time and it is onlynecessary to recharge it before the supply is exhausted so that the continual operation of the grinder will not be stopped. Y

It will be seen, therefore, that the operation is such that the closure door 31 is moved to closed position before the next charge of logs is dropped down and by reason of the Vfact that a charge of logs which has entered; the pocket is suilicent only to charge the pocket. there can be nothing to interfere with'the' closing of the door. Thus the apparatusA will work automatically andv eiciently, and there can be no delavs incident to jamming of the door or over-crowding of the magazine. Furthermore. owing to the fact that this door forms a solid top to the lgrinder pocket the logs are released fro-m pressure from above and yet cannot be crowded out above the pocket during grinding.

A further embodiment of my invention is illustrated in Figures 6 and '7. The arrangement here shown is applicable to magazines of the low built type providing for the reception of a body of logs which will form only two charges.

According to this arrangement the log retaining device H mounted on the magazine J takes the form of hook-like members 43 swingably mounted on each side of the magazine from the shafts 44 and 44 and link connected by means of a suitable linkage system 45 to operate in unison when one of the shafts is rotated. Connected to the shaft 44 is an operating lever 45 which is pivotally connected through the link structure 41 to a piston rod 48 carried Yby the piston within the cylinder 49 so that upon movement of the piston in either direction the shafts 44 and 44' will be rotated through an arc in a corresponding direction.

According to the preferred form opposite walls of the magazine are slotted or oriced as at 59 so Vthat the projecting ends 5| of the hook-like members may pass therethrough into and out of the magazine, the members 43 being preferably connected together by a suitable tie bar 52. When the members 43 are swung inwardly so that their projecting ends 5| extend within the magazine as shownin Figure. 6, they co-cpera-te: to` retain logs introduced tothe magazine at a. given level and when moved outwardly to the position illustrated in. dottedA lines in Figure 6; the logs:l heldV thereby will be dropped to a'lower position illustrated iii-dotted lines.. f .Y l l The operationof. the cylinder 49l is controlled' by the valve mechanism 53, the valve contained therein beingy connectedv to the valve rod 54 which is pivotally connected tothe bell cran-k lever 55 in turn link connected by alink 35B' toma leverl. i

The'rpressure shoe K is designed to carry a trip dog 58'which is pivotally mountedon the pressure shoe and disposed in alignment with the lever -51 andl projecting in its path. Therefore, assuming that the pocket has been fllledwith a chargetofv logs and the shut oir door L has been closed throughits operating cylinder 59, as the pressure shoe aolvances in the grinding operation the dog 58 will come in contactr with the lever' 51 thus drawing the valve rod 54.- downwardly, throughv the bell crank lever 55 and connecting link 5&5'. This inV turn operates the Valve structure 53 controlling operation of the cylinder 49- so that the piston rod 48 willadvance towards the left, thus operating the members 43 outwardly to the position shown in dotted lines in Figure 6 and allowing theY logs to fall intothe lower portion of. theV magazine. Assoon as the ,dog 58 has advanced far1 enough to clear the lever 51 the coil spring 6U returns this lever to its original position and thus operates the valve rod 54 to its formerv position so that the members 43 will be moved tovtheir former position with their ends. 5|' projecting within the magazine so that the operator can reload.

.When reloading has taken place the magazine is filled to capacity having a pocket charge of logs in itsv upper portion .above the ends of they members 43 anda second pocket` charge. therebelow resting upon the shut off door L. Consequently, Ywhen the pressure shoey K has reached the end of itsvv stroke and is automatically re` versed at which pointthe shut off door L forming the top of the grinder pocket is also reversed, the lower pocket charge will discharge into the pocket while the upper pocket charge will drop to assume the lower position just after the shut off door L has been closed again and the pressure shoe has advanced so that contact is made between the trip dog 58 and lever 51.

This type of apparatus lends itself to a very practical form of loading in that it. provides for a uniformity in the arrangement of the logs loaded without any difficulty. For instance, in the case where the operator has not got around to the unit in time to load a second charge to the magazine and the magazine has been completely emptied, it is mierely necessary to load the logs into the top of the magazine onto the projecting ends 5| of the members 43, as shown in Figure 6, and by means of a manually operable device, such as the member 6| which is pivotally connected to a link 62 in turn pivotally connected to a valve rod 54, the valve structure 49 may be reversed so that the log charge is dropped to the bottom of the magazine and upon releasing the member 6| to allow the members 43 to assume their operative position the second charge may be loaded.

In this respect it will be apparent that the depth to which it is necessary to load the logs is comparatively shallow in each loading operation. Thus the operator will have little diliculty in loading the logs in a proper manner whereas in loading the magazine from the bottom to the top due to the extent of the drop the logs can readily lodge in a very irregular manner thus making it necessary for the operator to prod within the magazine to move them into a proper arrangement. This form of apparatus is only applicable to a two charge magazine in that there must be no logs in the upper area of the magazine when the members 43 are returning to their operative position with the projecting ends extending into the magazine, otherwise the projecting ends would come in contact with any logs that were there and thus the mechanism would be jammed and inoperative. However, it will be noted that the log retaining members 43 function in a very similar manner to the forms illustrated in Figures 1 and 4 since they act positively to retain a group of logs against movement and are adapted to various forms of operating means to' provide for a smooth and desired operation of the grinder.

Having regard to the foregoing, it will be apparent that the invention, in providing for the positive retention of all logs in a given plane and those thereabove, opens a new eld since, apart from providing means for relieving the weight of a column of. logs in a magazine, it provides for a new mode'of charging the grinder pocket and permits the use of a shut off door between the grinder pocket and themagazine which combines with the log engaging devices in operation. The apparatus,'as indicated, may be operated in various ways and it is applicable to magazines of different types.

' Various modifications may be Vmade in the invention without departing from the spirit thereof or the scope of the claims and, therefore,'the exact forms shown are to be taken as illustrative only and not in a limiting sense, and I desire that only such limitations shall be placed thereon as ar-e imposed by the prior art or are specifically set forth in the appended claims.

I claim:

1'. In a magazine grinder, a vertical magazine means intermediate yof the height of the magazine designed to contact with and penetrate thelends of certain logs contained in the magazine to positively retain said logs and those thereabove against movement.

2. In a magazine grinder, means designed to contact with a plurality of logs in a magazine intermediate of the height thereof to positively retain said logs and those thereabove against movement, said means including a. pair of members having spikes projecting therefrom operable to engage the logs.

3. In a' magazine grinder, a pair of members having a plurality of spikes projecting therefrom mounted on opposite sides of the magazine outside the Walls thereof intermediate of the height thereof, said spikes being designed to be projected through said Walls into contact with the logs contained within the magazine, means for operating the spikes comprising a piston and cylinder, a piston rod, lever means connecting the piston rod to the spikes to move said spikes in one direction or the other according to the movement of the piston, valve mechanismconnected with the said cylinder to control Ythe movement of the piston, and means for operating the valve mechanism.

4. In a magazine grinder, a magazine, guides carried on the walls of the magazine, a pair of members slidably mountedv in the guideshaving a plurality of spikes projecting therefrom, said spikes Ybeing designed to be projected through said walls into contact with the logs contained in the magazine, and means for operating said members simultaneously through said walls into contact with said logs. v f

5. In a magazine grinder and in combination,

a grinding pocket, a grindstone at the end of the same, feeding means operating in the pocket for feeding logs against the grindstone, aimagazine above the pocket, means controlling the feeding of logs from the magazine to the pocket and slidable spike members on the vmagazine extending across the same intermediate of the height thereof for separating the logs into a plurality of charges. v

CHARLES ALEXANDER WATEROUS. y 

